我尝试使用LaunchServices框架。不幸的是,某些功能仍然不可用。例如,函数 kLSSharedFileListFavoriteItems 已成功导入。但是,我无法加载函数LSSHaredFileListCreate。法典:
unit LSSharedFileList;
interface
uses MacApi.CoreFoundation, MacApi.CocoaTypes;
const
LaunchServicesLib =
'/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/LaunchServices';
type
{$EXTERNALSYM LSSHaredFileListRef}
LSSHaredFileListRef = Pointer;
{$EXTERNALSYM LSSHaredFileListCreate}
function LSSHaredFileListCreate(inAlloccator : CFAllocatorRef; inListType : CFStringRef;
listOptions : CFTypeRef) : LSSHaredFileListRef; cdecl;
{$EXTERNALSYM kLSSharedFileListFavoriteItems}
function kLSSharedFileListFavoriteItems() : CFStringRef; cdecl;
implementation
uses Posix.Dlfcn;
var
_LSSHaredFileListCreate : Pointer = nil;
_kLSSharedFileListFavoriteItems : Pointer = nil;
_libHandle : THandle = 0;
//--------------------------------------------------------------------------------
function LSSHaredFileListCreate(inAlloccator : CFAllocatorRef; inListType : CFStringRef;
listOptions : CFTypeRef) : LSSHaredFileListRef;
begin
if not Assigned(_LSSHaredFileListCreate) then
_LSSHaredFileListCreate := dlSym(_libHandle, MarshaledAString('LSSHaredFileListCreate'));
Result := nil;//
end;
//-----------------------------------------------------------------------
function kLSSharedFileListFavoriteItems() : CFStringRef;
begin
if not Assigned(_kLSSharedFileListFavoriteItems) then
_kLSSharedFileListFavoriteItems := dlSym(_libHandle, MarshaledAString('kLSSharedFileListFavoriteItems'));
Result := CFStringRef(_kLSSharedFileListFavoriteItems^)
end;
//----------------------------
initialization
_libHandle := dlOpen(MarshaledAString(LaunchServicesLib), RTLD_LAZY);
finalization
dlclose(_libHandle)
end.
因此,_LSSHaredFileListCreate始终为零,不像_kLSSharedFileListFavoriteItems,它具有正确的地址。也许,"LSSharedFileListCreate"包含在另一个库中?知道吗?谢谢。
错误在于库函数的名称。
_LSSHaredFileListCreate := dlSym(_libHandle, MarshaledAString('LSSHaredFileListCreate'));
正确的代码是
_LSSHaredFileListCreate := dlSym(_libHandle, MarshaledAString('LSSharedFileListCreate'));
(LSS*h*aredFileListCreate)